Metering spout bowl assembly

A spout bowl assembly for a glass forming machine which forms containers from discrete gobs cut from individual streams of molten glass discharged from the spout bowl assembly, said spout bowl assembly comprising

• a spout bowl for receiving molten glass including a bottom having a horizontal tube seating surface with a discharge hole defined therein, and
• a tube for controlling the flow of received molten glass from said spout bowl into said discharge opening,
• said tube having a cylindrical outer wall and a flat, horizontal bottom surface located vertically above said tube seating surface and vertically locatable between a first position in engagement with said tube seating surface to an elevated position a selected vertical distance above said tube seating surface,
• said tube being located at a fixed location during the operation of said spout bowl assembly,
• said spout bowl additionally including an annular wall extending upwardly from said tube seating surface said selected vertical distance, and
• said annular wall and the bottom portion of said tube wall extending said selected distance from the bottom of the tube being selectively configured relative to one another so that during at least a portion of the displacement of said tube from said engaged position to said upper position the effective flow area between said tube and said annular wall will be changed so that during such portion of the displacement, vertical displacement will change the spacing between said tube bottom surface and said tube seating surface and will conjointly change the effective area between said tube and said wall.